PUBLICATION
CRISPR/Cas9-mediated grna gene knockout leads to neurodevelopmental defects and motor behavior changes in zebrafish
- Authors
- Zhu, J., Xu, H., Song, H., Li, X., Wang, N., Zhao, J., Zheng, X., Kim, K.Y., Zhang, H., Mao, Q., Xia, H.
- ID
- ZDB-PUB-210123-22
- Date
- 2021
- Source
- Journal of neurochemistry 157(3): 520-531 (Journal)
- Registered Authors
- Keywords
- grn, CRISPR/Cas9, PGRN, knockout, phenotype, zebrafish
- MeSH Terms
-
- Animals
- Axons/pathology
- Axons/ultrastructure
- Behavior, Animal
- Body Weight/genetics
- CRISPR-Associated Protein 9
- CRISPR-Cas Systems*
- Exons/genetics
- Frameshift Mutation
- Gene Knockout Techniques/methods*
- Genotype
- High-Throughput Screening Assays/methods
- Intercellular Signaling Peptides and Proteins/genetics*
- Mice, Transgenic
- Motor Activity/genetics*
- Motor Neurons/pathology
- Motor Neurons/ultrastructure
- Neurodevelopmental Disorders/genetics*
- Neurodevelopmental Disorders/physiopathology
- Neurodevelopmental Disorders/psychology
- RNA, Guide, Kinetoplastida/genetics*
- Zebrafish*
- Zebrafish Proteins/genetics*
- PubMed
- 33480022 Full text @ J. Neurochem.
Citation
Zhu, J., Xu, H., Song, H., Li, X., Wang, N., Zhao, J., Zheng, X., Kim, K.Y., Zhang, H., Mao, Q., Xia, H. (2021) CRISPR/Cas9-mediated grna gene knockout leads to neurodevelopmental defects and motor behavior changes in zebrafish. Journal of neurochemistry. 157(3):520-531.
Abstract
Progranulin (PGRN) is a secreted glycoprotein with multiple biological functions in early embryogenesis, anti-inflammation, and neurodegeneration. A good model for the functional study of PGRN is the zebrafish with knockdown or knockout of grn, the gene encoding PGRN. Morpholino oligonucleotides (MOs) and zinc finger nucleases have been used to generate zebrafish grn models, yet they have shown inconsistent phenotypes due to either the neurotoxicity of the MOs or possible genetic compensation responses during gene editing. In this study, we generated stable grna (one of the major grn homologues of zebrafish) knockout zebrafish by using CRISPR/Cas9-mediated genome editing. A grna sgRNA was designed to target the similar repeated sequence shared by exon 13, exon 15, and exon 19 in zebrafish. The F1 generation with the frameshift mutation of +4 bp (the addition of 4 bp to exon15), which causes a premature termination, was obtained and subjected to morphological and behavioral evaluation. The grna knockout zebrafish showed neurodevelopmental defects, including spinal motor neurons with shorter axons, decreased sensory hair cells, thinning of the outer nuclear layer and thickening of the inner nuclear layer of the retina, decreased expression of rhodopsin in the cone cells, and motor behavior changes. Moreover, the phenotypes of grna knockout zebrafish could be rescued with the Tol2 system carrying the grna gene. The grna knockout zebrafish model generated in this study provides a useful tool to study PGRN function and has potential for high-throughput drug screening for disease therapy.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping